AGSparqlSelect.java
package com.franz.agbase.examples;
import com.franz.agbase.*;
public class AGSparqlSelect {
public static void main(String[] args) throws AllegroGraphException {
AllegroGraphConnection ags = new AllegroGraphConnection();
try {
ags.enable();
} catch (Exception e) {
throw new AllegroGraphException("Server connection problem", e);
}
AllegroGraph ts = ags.renew("sparqlselect", AGPaths.TRIPLE_STORES);
ts.registerNamespace("ex","http://example.org/");
ts.addStatement("!ex:a","!ex:p", "!ex:b");
ts.addStatement("!ex:b","!ex:p", "!ex:c");
String query = "SELECT * {?s ?p ?o}";
SPARQLQuery sq = new SPARQLQuery();
sq.setTripleStore(ts);
sq.setQuery(query);
doSparqlSelect(sq);
}
@param
@throws
public static void doSparqlSelect(SPARQLQuery sq) throws AllegroGraphException {
if (sq.isIncludeInferred()) {
System.out.println("\nQuery (with RDFS++ inference):");
} else {
System.out.println("\nQuery:");
}
System.out.println(" " + sq.getQuery());
ValueSetIterator it = sq.select();
AGUtils.showResults(it);
}
}
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